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Can anybody help with the following Power Systems question
A 33 kV substation has three sets of busbars A, B and C. Each of the busbars A and B is connected to C by 15 MVA reactors of 0.1 pu reactance. Busbar A is supplied by a power system having a fault level of 1000 MVA and busbar B is supplied by a 50 MVA generator of 0.3 pu reactance. Busbar B supplies an 11 kV transmission line of reactance 5 Ω /ph via a 10 MVA 33/11 kV transformer of reactance 0.1 pu.
If a symmetrical three-phase fault occurs at the far end of the transmission line determine the fault current and voltages on busbars A, B and C
The disk uniformly rotates in air about its axis (perpendicular to the disk) with an angular velocity . Find the magnetic flux density vector at an arbitrary point along the axis of rotation. Assume that the charge distribution over the disk remai..
Draw up a flow chart for testing any four-terminal MOSFET with an ohmmeter which can be used to conclusively determine which lead is the gate, which lead is the body, whether the device is an n-channel or p-channel, and whether the device is a D-m..
A signal has a fundamental frequency of 1000 Hz. What is its period? Assume the signal has a peak amplitude of 1 Volt and that the instantaneous power is equal to the square of the voltage, then compute the average power of the fundamental frequen..
A cube with an edge of length 2 mm is charged to -1.2 C. Find: a)ρv , if the charge is distributed uniformly over its volume ; b) ρs , if the charge is distributed uniformly on its surface; c)ρL , if the charge is distributed uniformly on the edges o..
A single-loop negative feedback system has the loop transfer equation: L(s)=Gc(s)G(s)=K(s+2)^2 / (s(s^2+1)(s+8)) a. Sketch the root locus for 0 K infinity to indicate the significant features of the locus. b. Determine the range of the gain K for whi..
How tall must the antennas be if the link operates on a frequency of 2.450Ghz, D1=5miles, D2=11miles, and the obstruction is 60 feet high?
Calculate the impedance to neutral of this line. Calculate the line charging current in A/phase if the line is 100 km long and is operated at line-line voltage of 230 kV (8.565 pF/m, j3.23 micro-Siemens/km, 42.9 A/phase)
A sequential circuit has two inputs (A and B) and contains one D flip-flop that has only D and clock inputs. If A = B the flip-flop is unchanged, otherwise the flipflop is complemented. Find the excitation equation for the D flip-flop
The power is generated by a DC power facility at a voltage of 10 V and deliver by two power lines with resistance Rline=3 ohm. The maximum power the voltage source can deliver is 5 W. a) Find the total power delivered by this DC voltage source
draw out a schematic that implements a 3-bit XOR gate, but consisting of only 2-bit NAND gates. Your schematic should have from 8-10 NAND gates, but NO other logic function such as OR, AND, INV gates can be in your final design.
Describe the operation of the series RC circuit. The discussion must address phase angle relationships of current and voltage. The answer must include the effect of source frequency on the voltage drops across the resistor and the capacitor at ver..
Suppose you have a line charge and a point charge in space. A point charge of 16nC is located at Q(2,3,5) in free space, and a unifor line charge of 5nC/m is at the intersection of the planes x=2 and y=4. If the potential at the origin is 100V, fi..
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